# Development for NRF51

This page aims at documenting how to start developing with Crazyflie 2.X NRF51 chip

### Note on programming cables

To be able to flash code without using the radio and to debug it a SWD cable is needed.

By default any cable supported by openODC can be used. STLink-V2 is used by the Bitcraze team. Other cables like JLink can also be used but will require to manually enter the flashing command line and to modify Eclipse configuration.

The SEGGER J-LINK can be used for debugging and flashing.

make flash